xref: /dpdk/doc/guides/cryptodevs/qat.rst (revision d6740135f0401f3d67bae762c9013b1cd28d0ea4)

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Quick Assist Crypto Poll Mode Driver
====================================

The QAT PMD provides poll mode crypto driver support for **Intel QuickAssist
Technology DH895xxC** hardware accelerator.


Features
--------

The QAT PMD has support for:

Cipher algorithms:

* ``RTE_CRYPTO_SYM_CIPHER_AES128_CBC``
* ``RTE_CRYPTO_SYM_CIPHER_AES192_CBC``
* ``RTE_CRYPTO_SYM_CIPHER_AES256_CBC``
* ``RTE_CRYPTO_SYM_CIPHER_AES128_CTR``
* ``RTE_CRYPTO_SYM_CIPHER_AES192_CTR``
* ``RTE_CRYPTO_SYM_CIPHER_AES256_CTR``
* ``RTE_CRYPTO_SYM_CIPHER_SNOW3G_UEA2``
* ``RTE_CRYPTO_CIPHER_AES_GCM``
* ``RTE_CRYPTO_CIPHER_NULL``

Hash algorithms:

* ``RTE_CRYPTO_AUTH_SHA1_HMAC``
* ``RTE_CRYPTO_AUTH_SHA224_HMAC``
* ``RTE_CRYPTO_AUTH_SHA256_HMAC``
* ``RTE_CRYPTO_AUTH_SHA384_HMAC``
* ``RTE_CRYPTO_AUTH_SHA512_HMAC``
* ``RTE_CRYPTO_AUTH_AES_XCBC_MAC``
* ``RTE_CRYPTO_AUTH_SNOW3G_UIA2``
* ``RTE_CRYPTO_AUTH_MD5_HMAC``
* ``RTE_CRYPTO_AUTH_NULL``


Limitations
-----------

* Chained mbufs are not supported.
* Hash only is not supported except Snow3G UIA2.
* Cipher only is not supported except Snow3G UEA2.
* Only supports the session-oriented API implementation (session-less APIs are not supported).
* Not performance tuned.
* Snow3g(UEA2) supported only if cipher length, cipher offset fields are byte-aligned.
* Snow3g(UIA2) supported only if hash length, hash offset fields are byte-aligned.
* No BSD support as BSD QAT kernel driver not available.


Installation
------------

To use the DPDK QAT PMD an SRIOV-enabled QAT kernel driver is required. The
VF devices exposed by this driver will be used by QAT PMD.

To enable QAT in DPDK, follow the instructions mentioned in
http://dpdk.org/doc/guides/linux_gsg/build_dpdk.html

Quick instructions as follows:

.. code-block:: console

	make config T=x86_64-native-linuxapp-gcc
	sed -i 's,\(CONFIG_RTE_LIBRTE_PMD_QAT\)=n,\1=y,' build/.config
	make

If you are running on kernel 4.4 or greater, see instructions for
`Installation using kernel.org driver`_ below. If you are on a kernel earlier
than 4.4, see `Installation using 01.org QAT driver`_.


Installation using 01.org QAT driver
------------------------------------

Download the latest QuickAssist Technology Driver from `01.org
<https://01.org/packet-processing/intel%C2%AE-quickassist-technology-drivers-and-patches>`_
Consult the *Getting Started Guide* at the same URL for further information.

The steps below assume you are:

* Building on a platform with one ``DH895xCC`` device.
* Using package ``qatmux.l.2.3.0-34.tgz``.
* On Fedora21 kernel ``3.17.4-301.fc21.x86_64``.

In the BIOS ensure that SRIOV is enabled and VT-d is disabled.

Uninstall any existing QAT driver, for example by running:

* ``./installer.sh uninstall`` in the directory where originally installed.

* or ``rmmod qat_dh895xcc; rmmod intel_qat``.

Build and install the SRIOV-enabled QAT driver::

    mkdir /QAT
    cd /QAT
    # copy qatmux.l.2.3.0-34.tgz to this location
    tar zxof qatmux.l.2.3.0-34.tgz

    export ICP_WITHOUT_IOMMU=1
    ./installer.sh install QAT1.6 host

You can use ``cat /proc/icp_dh895xcc_dev0/version`` to confirm the driver is correctly installed.
You can use ``lspci -d:443`` to confirm the bdf of the 32 VF devices are available per ``DH895xCC`` device.

To complete the installation - follow instructions in `Binding the available VFs to the DPDK UIO driver`_.

**Note**: If using a later kernel and the build fails with an error relating to ``strict_stroul`` not being available apply the following patch:

.. code-block:: diff

   /QAT/QAT1.6/quickassist/utilities/downloader/Target_CoreLibs/uclo/include/linux/uclo_platform.h
   + #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,18,5)
   + #define STR_TO_64(str, base, num, endPtr) {endPtr=NULL; if (kstrtoul((str), (base), (num))) printk("Error strtoull convert %s\n", str); }
   + #else
   #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,38)
   #define STR_TO_64(str, base, num, endPtr) {endPtr=NULL; if (strict_strtoull((str), (base), (num))) printk("Error strtoull convert %s\n", str); }
   #else
   #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,25)
   #define STR_TO_64(str, base, num, endPtr) {endPtr=NULL; strict_strtoll((str), (base), (num));}
   #else
   #define STR_TO_64(str, base, num, endPtr)                                 \
        do {                                                               \
              if (str[0] == '-')                                           \
              {                                                            \
                   *(num) = -(simple_strtoull((str+1), &(endPtr), (base))); \
              }else {                                                      \
                   *(num) = simple_strtoull((str), &(endPtr), (base));      \
              }                                                            \
        } while(0)
   + #endif
   #endif
   #endif


If the build fails due to missing header files you may need to do following:

* ``sudo yum install zlib-devel``
* ``sudo yum install openssl-devel``

If the build or install fails due to mismatching kernel sources you may need to do the following:

* ``sudo yum install kernel-headers-`uname -r```
* ``sudo yum install kernel-src-`uname -r```
* ``sudo yum install kernel-devel-`uname -r```


Installation using kernel.org driver
------------------------------------

Assuming you are running on at least a 4.4 kernel, you can use the stock kernel.org QAT
driver to start the QAT hardware.

The steps below assume you are:

* Running DPDK on a platform with one ``DH895xCC`` device.
* On a kernel at least version 4.4.

In BIOS ensure that SRIOV is enabled and VT-d is disabled.

Ensure the QAT driver is loaded on your system, by executing::

    lsmod | grep qat

You should see the following output::

    qat_dh895xcc            5626  0
    intel_qat              82336  1 qat_dh895xcc

Next, you need to expose the VFs using the sysfs file system.

First find the bdf of the DH895xCC device::

    lspci -d : 435

You should see output similar to::

    03:00.0 Co-processor: Intel Corporation Coleto Creek PCIe Endpoint

Using the sysfs, enable the VFs::

    echo 32 > /sys/bus/pci/drivers/dh895xcc/0000\:03\:00.0/sriov_numvfs

If you get an error, it's likely you're using a QAT kernel driver earlier than kernel 4.4.

To verify that the VFs are available for use - use ``lspci -d:443`` to confirm
the bdf of the 32 VF devices are available per ``DH895xCC`` device.

To complete the installation - follow instructions in `Binding the available VFs to the DPDK UIO driver`_.

**Note**: If the QAT kernel modules are not loaded and you see an error like
    ``Failed to load MMP firmware qat_895xcc_mmp.bin`` this may be as a
    result of not using a distribution, but just updating the kernel directly.

Download firmware from the kernel firmware repo at:
http://git.kernel.org/cgit/linux/kernel/git/firmware/linux-firmware.git/tree/

Copy qat binaries to /lib/firmware:
*    ``cp qat_895xcc.bin /lib/firmware``
*    ``cp qat_895xcc_mmp.bin /lib/firmware``

cd to your linux source root directory and start the qat kernel modules:
*    ``insmod ./drivers/crypto/qat/qat_common/intel_qat.ko``
*    ``insmod ./drivers/crypto/qat/qat_dh895xcc/qat_dh895xcc.ko``

**Note**:The following warning in /var/log/messages can be ignored:
    ``IOMMU should be enabled for SR-IOV to work correctly``



Binding the available VFs to the DPDK UIO driver
------------------------------------------------

The unbind command below assumes ``bdfs`` of ``03:01.00-03:04.07``, if yours are different adjust the unbind command below::

   cd $RTE_SDK
   modprobe uio
   insmod ./build/kmod/igb_uio.ko

   for device in $(seq 1 4); do \
       for fn in $(seq 0 7); do \
           echo -n 0000:03:0${device}.${fn} > \
           /sys/bus/pci/devices/0000\:03\:0${device}.${fn}/driver/unbind; \
       done; \
   done

   echo "8086 0443" > /sys/bus/pci/drivers/igb_uio/new_id

You can use ``lspci -vvd:443`` to confirm that all devices are now in use by igb_uio kernel driver.